Home / 31,438.04-43,406.71-20,849.72

Finding the Fourth Proportional to 31,438.04, 43,406.71 and 20,849.72

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Solution

The fourth proportional to 31,438.04, 43,406.71 and 20,849.72 is: 28,787.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,438.04 : 43,406.71 = 20,849.72 : x
  2. Step 2: Convert to fraction form
    31,438.04/43,406.71 = 20,849.72/x
  3. Step 3: Cross multiply
    31,438.04x = 43,406.71 × 20,849.72
  4. Step 4: Simplify right side
    31,438.04x = 905,017,480.46
  5. Step 5: Solve for x
    x = 905,017,480.46/31,438.04
  6. Step 6: Final answer
    x = 28,787.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.